| Cornell Scott-Hill Health Corporation | Health Care and Social Assistance | $6,597,400 | $6,680,051 | 455 | N/A |  Research |
| Achievement First, Inc. | Other Services (except Public Administration) | $4,133,282 | $4,179,144 | 284 | N/A | Research |
| Withers Bergman LLP | Professional, Scientific, and Technical Services | $4,050,000 | $4,106,475 | 236 | $57.3M | Research |
| Planned Parenthood of Southern New England INC | Health Care and Social Assistance | $3,548,987 | $3,597,700 | 400 | N/A | Research |
| Wiggin & Dana LLP | Professional, Scientific, and Technical Services | $3,449,900 | $3,489,408 | 177 | $43.0M | Research |
| Central Connecticut Coast Young Men's Christian Assn., Inc. | Other Services (except Public Administration) | $3,317,300 | $3,354,472 | 422 | $80.6M | Research |
| Performance Environmental Services, LLC | Administrative and Support and Waste Management | $3,058,452 | $3,092,053 | 500 | $108.3M | Research |
| Albertus Magnus College | Public Administration | $3,037,792 | $3,071,998 | 471 | N/A | Research |
| Pelli Clarke Pelli Architects INC | Finance and Insurance | $3,023,064 | $2,749,077 | 123 | $63.2M | Research |
| Fair Haven Community Health Clinic INC | Health Care and Social Assistance | $2,972,258 | $3,009,879 | 197 | N/A | Research |
| Premier Education Group LP | Educational Services | $2,942,493 | $2,300,333 | 228 | $30.4M | Research |
| Amistad Academy, Inc. | Other Services (except Public Administration) | $2,782,000 | $2,813,174 | 211 | N/A | Research |
| Cogstate Inc. | Manufacturing | $2,444,200 | $2,470,950 | 123 | $32.2M | Research |
| Achievement First Hartford Academy, Inc. | Other Services (except Public Administration) | $2,360,400 | $2,386,591 | 175 | N/A | Research |
| Advanced Center for Nursing and Rehabilitation LLC | Health Care and Social Assistance | $2,328,300 | $2,354,517 | 387 | $65.8M | Research |
| Pelli Clarke Pelli Architects INC | Professional, Scientific, and Technical Services | $2,000,000 | $2,022,137 | 121 | $37.5M | Research |
| Central Connecticut Coast Young Men's Christian Assn. Inc. | Other Services (except Public Administration) | $2,000,000 | $2,017,333 | 300 | $57.3M | Research |
| Saybrook Point Inn LLC | Accommodation and Food Services | $2,000,000 | $2,016,986 | 118 | $36.9M | Research |
| Clifford W. Beers Guidance Clinic INC | Health Care and Social Assistance | $2,000,000 | $2,028,000 | 240 | N/A | Research |
| Mcvac Environmental Services INC | Administrative and Support and Waste Management | $1,953,297 | $1,965,831 | 75 | $14.2M | Research |
| Clifford W. Beers Guidance Clinic, Incorporated the | Health Care and Social Assistance | $1,885,910 | $1,910,401 | 185 | N/A | Research |
| American Leak Detection, INC | Construction | $1,869,800 | $1,887,422 | 194 | $61.4M | Research |
| Mary Wade Home INC | Health Care and Social Assistance | $1,845,295 | $1,796,677 | 217 | N/A | Research |
| The Mary Wade Home, Inc. | Health Care and Social Assistance | $1,845,000 | $1,867,645 | 215 | N/A | Research |
| Columbus House Inc. | Health Care and Social Assistance | $1,820,292 | $1,839,941 | 50 | N/A | Research |